79coyotefrg is right about the ct26. They are inexpensive and plentifull. Im in the process of putting a 22rte back to normal that was converted to a re. The ct20 was cracked in the same area as yours. I just picked up a good ct26 off of craigslist for $100. Theres one on there now for $80.
and if you plan on parting it out put me in line for the rte parts.