I came across this website recently which looks promising and helpful. It is similar to BentRiderOnLine forums and classifieds. BROL has been having lots of problems staying up and accessible so this is a welcome alternative for those dealing with that mess.
As you can see in their index they have much to offer. (Sorry for the blurriness.)
Of course, one has to join in order to post and comment.
KEEP ON TRIKIN’
You are invited to come join the Tadpole Rider Facebook Group. Please note that in order to join you must first answer the two membership vetting questions and agree to comply with the group rules.