OK, I'm prolly going to show my e-ignorance, but what the heck, if it help's y'all, mission accomplished.

One of my standard flea-bay searches turned up an interesting result. 2 props for one price, one pusher, one tractor. Yeah, they are from china, but they look interesting. And just think of the friendships you can start? Need a pusher? Give the tractor to a friend flying IC. Need a tractor? Give the pusher to an e-buddy. For the price, they are still cheaper than anything out there in carbon.

All kidding aside, these appear to be made for large quad copters, but come in some interesting diameter and pitches.

One of the objections I keep hearing for carbon copies of APC props is the carbon props are too heavy or draggy and eat up more battery capacity.
These look thin enough to perhaps not drain your batteries so much as other carbon props and might be worth playing with?

Here's a 13x4:

http://www.ebay.com/itm/13x4-Carbon-Fiber-Propeller-Set-CW-CCW-/130810146916?ssPageName=ADME:B:WNASIF:US:1123

and a 13x6.5:

http://www.ebay.com/itm/13x6-5-Carbon-Fiber-Propeller-Set-CW-CCW-/140891861486?pt=US_Character_Radio_Control_Toys&hash=item20cdcf31ee

If you look at sellers other items, he's got a whole bunch other sizes as well.
Anywho, I thought it was worth sharing with y'all.
Later,
EricV

My 2 pair of props has arrived.They look very nice.They are light and very stiff.`Most certainly worth 5 bucks a piece.I was fortunate enough to get 4 flights in yesterday but today it's 34 degrees and raining sideways.As soon as I can fly these props I will let ya's know how they work out.Trax