Landing Products (APC) lists a 14x7 thin electric which should do the trick
LP14070E 14X7E Thin Electric Props $4.89
Don't use a gas prop - they are fairly heavy and inefficient for electric use. The APC E range will be plenty strong enough for your purposes and you won't be anywhere near the max. rpm limit for this 14x7 APC E anyway (190,000/14 = 13500 rpm!).
New Creations-RC lists more props than you can shake a stick at. They have the 14x7 APC E (APC14070E), a 14x7 Freudenthaler folding prop HLAN3154 (glass) or HLAN364 (Carbon fiber), and a Robbe 14.5x7 folder (RD7773140). Send an e-mail to Kirk Massey [
[email protected]]
Cheers, Phil