I use Arcane Tinmen Mini sleeves.
Handy tip (and I’m sure I’m teaching you all to suck eggs), but always keep the packet the sleeves came from in the game box so you always know which ones you used, in case you need to get more…
I think this is the one I have and it works great:
Feldherr Foam Set Compatible with The Lord of The Rings: Journeys in Middle-Earth - Board Game Box https://www.amazon.com/dp/B07T98Y1N9/ref=cm_sw_r_awdo_AAZ0ED6RYG4D8P69NADY
I’m late to this but I had never painted before and had really good results with this reaper kit plus some random acrylics I had around (set doesn’t come with red). Followed Sorastro for the starter JiME after I painted the dudes that came with the kit as practice, v happy with the results and now am midway through shadowed paths!!
I know! I had a tough time finding it too. I think I got it for $20 on Amazon... More than I wanted to spend, but it's a big jar. It should last awhile.