Best place to buy glazing/glass at a reasonable price ?

With this cold weather the only glass in my dwelling which isnt double glazed in at the entrance and its losing heat at a terrible rate. I want to replace the glass across the entrance of my front door with double glazed units. The small panes in the door itself and in the surrounding frame in the panels on either side. I can do the monkey work myself but need to order the panels to the right size. Something either double/triple glazed and frosted would suit. Perhaps even some design would be nice to have too so it looks pretty
Theres a large panel across the top above the front door, 2 panels on either side of the door and some small pieces in the door itself. Its all wood and glass construction.
Anyone recommend a supplier in Dublin or if its cheaper even outside Dublin ? Any idea of the price ?
Also can anyone mention any pitfalls involved if they have experience with this kind of job ? It looks like the existing glass is held into place by wooden batons on the inside. It seems a case of simply removing the batons and replacing the glass. If some of the wooden batons break during removal, where also could I get replacements ? Is any putty necessary around the edges or should the batons be enough ?

First,
Navan glass or Blanchardstown Glazing, Double Nite (advertise in Buy and Sell).

Second, when fitting d/g units remember that the thickness of the dg unit is 4mm16mm4mm. Your existing slips might not be big enough. Buy new in woodies etc. Treat slips before painting them to match the existing door. run appropriate silicone behind glass and then in front (before installing slips.) easy peasey.

Helpful hint number 1. put on work clothes and tell them your trade .

computerman said:

Your existing slips might not be big enough. Buy new in woodies etc.

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Thanks for the tips The last thing I want it to be frozen out while I try to fix the new panes in so I need to be prepared so I can get it done fast.

In the actual front door itself theres a circular shaped area which is glass. I might need a new piece for there as one of them is in bad shape and mostly fixed with a filler. Its 4 quarter circular slips/batons which hold in 4 quarter circle shaped panes. Any tips about how to measure those or get replacements? It doesnt seem to be as simple as buying straight slips/batons and cutting them to measure.

Cardboard. Or more particularly, cardboard from a cornflakes box. Use this as your template and take to the glazers.

Two options with the irregular slips,
1. Get new ones in a joinery shop. There are several around.
2. Clear bonding to hold in the glass supplementing this with a few pins to firm the glass in place. Fresh bonding/ appropriate silicone on the outside finished off with running a wet finger over the silicone to give a neat finish. It should look like a window with putty on it.