Sometimes if you ask the vendor, they will waiver the necessity of a 10% booking deposit. That happened us, we couldnt come up with the 32,500 euro so our vendor solicitor decided they didnt require it and allowed us to continue with the sale until the final checque was drawn down to the full amount of 325000 euro.
It cant hurt to ask?!
EBS offer bridging loans but they do it through GE capital and it can be expensive, they offered this service to us which is what prompted us to approach the vendor through our solicitor.
best of luck.