I have two custom made dove tail plates to fit Losmandy mounts and accs.
Double Male 28" long (very rigid) - $100 (SOLD - Thanks Preston)
Single Male with 5" plate at one end to make double male 23" long - $90. This plate has only two holes drilled for Parallax rings. The 5" plate making that end double male is removable. Don't hesitate to call if you have questions. Prices do not include shipping. Thanks for looking. Nick 214-454-3811