Econo-Patriot..
Tell me about it! The Jett engines are awesome but pricey... I actually flew my ARF Patriot with an Irvine .53> it was mellow, but fun.
YS-45 w/macs pipe? (kinda pricey $175)
Rossi 45 w/minipipe ( about $100 used?)
TT Pro46 (ultrathrust..?)
MVVS 49 (?$?)
Cox Black widow .049?
Don't know if this helps but... The Patriot if fairly light with alot of wing so any strong 40-50 will get you started, and there are some powerful yet inexpensive engines out there that would fit the bill.
My .02
james