Want to Buy WTB - 35mm target slides

These were made by Kodak & probably other firms as well. They have a grid pattern & are used for aligning slide projectors. You mount the slide & project it on the screen & use the grid to get the projector correctly positioned.
I do slide shows every week where I have to set up the projector just before I start, so having some of these target slides would be a big help. I'm sure it's an obscure product but APUG seems a likely place to start asking.

I got a Kodak Q-Target from B & H in NYC shipped here as well as an Omega enlarger alignment neg from KHBPhotographic in Canada (via eBay) shipped as well. Or one could simply make one's own from an easy to find focus chart on the net, printed out and shot with a film camera (or digital and printed onto acetate and cut to fit a slide frame (from Vanbar - Syd & Melb)....good hunting! cheers, sam