I’ve looked but I was mainly looking for specific vendors on there that people have had good experiences with.How about Etsy?
A bit different view here. I believe it doesn't cause too much time & hassle to have David Klass to make a ring and set a stone from Gene at Precision Gem if you are not looking for a ring of a highly specific design.
They are both responsive, good quality (Precision cut with wide range of lab stone options & quality settings). Plus There seems to be a little discount from David using Gene's stone, you may check again with Gene to be sure.
Manor Jewels on Instagram (www.manorjewels.com) has this synth. color change (blue/purple/pink) step cut heart ring. Sz 6.5 $239. I've purchased from her a couple times. Quick ship and have been happy with the items.
I’d reach out to jellylabgem on Instagram and see what they have in stock. They just posted some lovely bezel rings with lab pads in them. They tend to keep a good stock of items ready to go. If you ordered today, it might get here in time. My last periwinkle lab sapphire purchase from them was super smooth and easy.
Can you check the name? That doesn’t come up on instagram