Sorry for any confusion - I was referencing the integrated LED you listed before: https://www.ledlightingwholesaleinc.com/DM-ST4FT40W-50K-p/dm-st4ft40w-50k.htm that are $40.15 each(when you break down the 4-pack) and are dimmable.
I use these or their predecessor. The look is identical and I bought from the same website but they were made by James. Have 30 of them and like them. Well made, easy to install, good light and I like the diffuser. Of course if one of the strips inside goes, you may not be able to order a new one online like you can for a fixture using replaceable LED tubes, and they cost more than the bare fixture and 2 tubes. I had no problem paying extra for the finished look and for my DIY use, I expect them to last long enough.
