As I see it you have 2 options. Both of which definitely involve forgetting about doing an Integrated course at OAT, sorry.
1) Talk to CTC - being ex-military their selection should be pretty easy for you (relatively speaking) and I believe they have some specialist funding arrangements (I could be wrong but can't hurt to ask 'em).
2) Seriously suggest listening to MaxDryPower. You won't find that kind of lending unsecured (certainly not from anyone you should consider borrowing from anyway
) but, more pertinently, you have already done a lot of the expensive bit of training (ie flying hours). Look seriously at the modular route rather than paying for lots of those hours over again.
If you are not yet 30 then you don't need to be so scared about your age. ... If you want to fear something then fear the shifting economic winds (
) but that's all the more reason to consider keeping your debts manageable in the event of a downturn by thinking of capitalising on your existing hours by going modular.
Just my 2penneth
BM