I also use roxicons. She does some lovely icons and is very willing to share her expertise. I can see that given your icon policy you might not be welcome... *g* And I see your point about sharing. I don't know if there are any comms like that. If I have icons to share I post them to e.g. fandom comms or on my own LJ. Plus, I think my f'list know that if they like my icon they can look at my list and if it's made by me they can take provide they credit.