I have this one. I've used it for 9 years or so without any visible wear. Plenty of wood to enable a repair if it breaks. Little thick for straight pool, so I had a more conventional one for that.
http://www.muellers.com/Premium-Maple-Triangle,2328.html?b=d*375
I also used to fix Brunswick racks for a room near my old home in NJ. I used wipe-on polyurethane to seal any exposed wood to eliminate splinters. I cleaned them first to remove the residue build-up inside. Waxed them after paint was dry. The factory glued joints failed often (6 joints each rack). I cleaned the pieces up with a triangular file, used two part epoxy and clamped it with a window frame type strap clamp. I removed one of the metal brackets of course. The metal brackets hold the strap off the wood so the epoxy doesn't get on it. If anyone needs more info on this technique, please PM me. Every joint I repaired did not fail again, 3 years until room closed. Saved that owner a ton of money, because he kept buying Brunswick's new ones at first.
The ones in the link look good, I just got some from Amazon along with some computer parts to try out, Imperial brand https://www.amazon.com/gp/product/B005GVKZGW/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 but these from Muellers look better built and colored.
No issues with gaps on those? I am not talking about brand new balls, but normal wear sets such as a pool room would have. We have Centennials but I am not sure of the age. They are in good shape though and clean.