Try the shop that does licence plates at Ubi (block 3005/6). Couldn't recall the name, but it is the first shop at the corner of the junction, next to Traffic Police HQ, parallel to Fong Kim.
Not sure if they have the PML frames, but they definitely carry the BMW or UDM frames.
Not sure if they have the PML frames, but they definitely carry the BMW or UDM frames.