I've got three small refractors that take a 2" diagonal. I occasionally fit it to them. But, together with a big low power eyepiece it makes them back heavy, and somewhat more awkward to set-up or to use. So I tend to use a 1.25" diagonal most of the time with a 16 to 20mm wideangle eyepiece - since what I want to see well usually requires higher power than that from a 32 to 40mm eyepiece.
I suggest that you just keep checking out the classifieds here, till something relatively inexpensive comes up.
Regards,
Renato
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