Originally Posted by
Bluish Green
This ^^^^
Answering the OP question first.
I would go to the L.B.S. ( L.ocal B.ike S.hop/S.tore ) you have the best experience with and ask them if they have any "take off" ( customer request remove ) rear reflectors that they could let you have.
Or go to any "auto parts store" or the auto parts section of any/most "Big Box" Mart and choose a D.O.T. ( D.epartment O.f T.ransportation ) approved reflector that best matches your needs.
As most/all traffic regulations require a rear red reflector attached to the bike to be legal on the road ( admittedly rarely enforced at best ), I just left the C.P.S.C. ( C.onsumer P.roducts S.afety C.ommission ) reflectors required on all new bikes sold in the U.S. on my bikes. Although most people Remove/Discard them soon after taking possession of their new bike as they are not considered fashionable and/or weight saving.