There is a Czech gent making radar pods for the 337 out of fiberglass/kevlar. He has posted photos in one of the Skymaster fan groups on Facebook. Herb is a member there I think. The guy also makes several other parts for Skymasters, and looks to be doing good quality work.
I guess there is still some market for radar pods, but I use a combination of ADS-B weather for strategic avoidance and my BF Goodrich heading-coupled strike finder for tactical avoidance. Never felt the need for radar.
So when your ADS-B weather went south on your Florida flight, did your MX-500 not give a decent picture of the weather for you? At least where the lightning was?
How common is it for ADS-B weather to fail like that, in a critical moment?
A treatise on why Stormscope is better for pilots than either radar or Nexrad:
http://www.safepilots.org/library/co...s_08-23-10.pdf