I have a new (still in the bubble wrap and never used) DM10 Losmandy dovetail plate for a 10" Meade SCT. From Losmandy's website: "Meade dovetail plate for 10", bolts to existing holes.
Wt. 2.5 lbs. Length 17.25" HS 16.0/16.50, Ht. top of tube to top of dovetail plate 1.00" ". These sell for $90 plus shipping; I'll sell this one for $80 shipped CONUS. I accept Paypal (no surcharge) or postal money orders. Astromarters with great feedback can send a personal check.