I am about to purchase an OS 15LA for an electric to glow conversion plane and came up with this problem.

The crankshaft thread size for it is 5mm.
But the only prop i found on TH ,
with center hole 5mm for fitting the 15LA was some MA's.
All APC's and TF props i found have center hole more than 5mm,app. 5.5mm.

So what can i do?
Anyone that encounter the same problem?

Kostas