Pulled a hitch off a 300d at the junkyard a few weeks ago. Ball looked like it had seen a lot of use. Just bolted to the bumper with 4 bolts. No evidence of any problems. I plan on putting the hitch on my 300d or td. My guess is that the hitch was a universal hitch available from JC Whitney for around $50. I put something similar on the bumper of a Land Cruiser I used to own. I'd certainly look for one of those before dropping $220.
I visted a hitch shop a few weeks ago and they quoted $330 for a hitch for a 300d.
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13