Creating shirts that cater to other merch sellers

sometimes I think of funny ideas for shirts that relate to the merch business, it would be great if there was a good place to share shirts that we think our fellow designers would fine clever! we're already a great support system, why not help eachother get sales and tier up as well! Anyone find a good way to do this? I feel like a dedicated space would be good as not to clutter up existing groups and such with too many posts.