On Thursday, July 16, 2015 at 6:11:00 PM UTC-4, wrote:
You should be able to get a set from wings and wheels. You'll probably have to buy 2.

If you only need one, say to let you make an unassisted aerotow launch from some lonely airport where you have landed out, you can use a temporary wheel. I keep a small wheel and some heavy duty double sided tape in my glider. You can get the wheel and the tape at any hardware store. Be sure to get the heavy duty tape. It's gray, with a red plastic film.

Good luck!

I'm assuming he means a way to support the wing while moving it/the sailplane.
I may be incorrect, he may mean a tip wheel, but I don't believe '19's came with one stock (most of those gliders didn't, they all had droop tips).

BTW, it's totally possible to do an unassisted take-off with only "droop tips", I've done it quite a few times before, just takes a little thinking up front.... ;-)