The Reveres Seem Pretty Rare...they had a Few Spots in Gadsden,AL with 2600 and the larger 2700's in Parking Lot...and Meredian,MS has alot of HPS Converted 2700's along with Both Sizes of Unidors.
Yup...don't know if there is any Replacement you can use.....those Reveres were Pretty Odd....they were almost attempting to Copy Silverliners Design but with a M400 Bowl Style Refractor.