Getting a few bits over the winter for next year but..... A Bit Stuck

[lowry_uk]

I am sort of happy with the exterior of my PD130 at the moment, finally got some alloys i like.
 
I have a fantastic opportunity to get my car remapped by a very reputable company for £150 which im gunna go for.
 
My Dual MAss Flywheel and clutch is only a year old so no need to change for a new one yet.
 
My Questions are to release a few horses without breaking the bank so to speak
 
1. ALready Bought a EGR Delet to help breath a bit better
 
2. Where can i get a decent/Resonably priced Decat??
 
3. Can i use a Petrol Non Res Milltek Backbox?? If not which is best for price and quality??
 
4. Where can i get a decent/Resonably priced FMIC?? Are eBay ones any good??
 

Thanks alot guys