Hi Tony,
If your 1.25" diagonal has a screw off top with a M42 thread, then this adapter/extension may be useful.
http://www.ebay.com/itm/New-M42-to-1...-/321757913944
Basically, screw off the top (not the "nose" of the diagonal, just the tip to expose the M42 thread), thread the adapter in place and the eyepiece can be clamped in.
Bo