Too late for the SSIA Pensions Incentive i'm afraid - it's written into legislation, so it's pretty rigid. The following is from the Revenue's website:
3-month time limit for pension subscription
SSIA holders are obliged to make a subscription to an approved pension product within 3 months of the maturity date concerned.
For SSIA maturities in May, June, July and August 2006, the cut off point for the PITC scheme is extended to 31 December 2006. For maturities from September onwards, the three-month time frame set out in the legislation will apply.
The details are as follows:
May maturities limit now extended to 31 December 2006.
June maturities limit now extended to 31 December 2006.
July maturities limit extended to 31 December 2006.
August maturities limit extended to 31 December 2006.
September maturities 3-month time limit applies and cut off point is 31 December 2006.
October - April maturities - 3-month time limit will apply to these.