Sadly ive never been able to try, I can barely generate images as I only have 3gb of VRAM (and 4GB is the minimum). I did have a quick look and found this: civatai. I also took a look on the the Unstable Diffusion subreddit and found somebody who makes the type of content you are looking for. They don't use a LoRA but instead pose with action figures and then use stable diffusion to replace the figures with models, interesting approach which works pretty well but a lot more involved ofc
Civatai seems awesome, I've gotta check it out, thanks!
Using action figures with stable diffusion sounds really difficult lol. I'm bad at posing stuff IRL, I once spent multiple hours trying to take a single nude photo to post on discord lol