I didn't see a supplies section, hope it's ok I post my question here. I'm interested in purchasing a certain plant tray with dome to start my seeds in, my old one was cheap and ended up damaged from use. The new tray I'm looking at comes with what looks like a nice heavy duty block with sponges, description says the block can be used over and over. Issue is they do not sell the sponges individually, you have to buy a whole new block (minus the tray and dome). I would hate to keep buying new blocks just for the sponges, I'll have blocks all over the place if I do that. I'm hoping someone can help me source 3 inches high x 2 3/4 inches wide sponges/plugs or at least a size close enough to work. Worse case, if I can't find any, I could always just keep filling them with living soil instead of using sponges or find a different tray/dome kit. Appreciate the help! Sent from my SM-S908U using Tapatalk