Dennis Kirk claims to have 4 #8863 splined peg adapters left in stock.8815 is correct. It is chrome, but not really noticeable once installed. Good luck finding 8863. Let us know if you find a source.
Shouldn't wobble, but they need to have enough play to fold up.
Kuryakyn Gloss Black Splined Peg Adapter - 8863 Cruiser Motorcycle - Dennis Kirk