I have an Orion glass solar filter for SVD6, SkyQuestXT6 (#07735), fits an MN66 too!
It is in perfect(LNIB)condition! I.D.=7.13"
I used it once!
Purchase, tax, and s/h was $122.
I will ship to your door for $85, or best offer.
Last try, or it's a keeper!
Thanx for looking!