We have several CDM-570L 24VDC BUC Power Supply modules for sale.
Not all CDM-570L modems are purchased with a BUC power supply, or in other cases the modem may have a 24V installed, but require 48V power supply instead. Either way, in a few minutes one of our power supplies can be easily installed in the CDM-570L.
We have several used 24VDC modules, saved as a result of upgrading the modems from 24VDC to 48VDC.
At the time of posting Comtech charge $495 for the power supply, ours are used, and sold at half the price of a new part.
These power supplies are manufactured by Cosel, but beware of buying them direct because Comtech need some enhancements that allows their software to enable or disable the output.