I've got a Li jump pack from Harbor Freight, but don't recall if I tested it on my 300D's, just my V-6 gas engine. One thing to note with them is that most turn off the jump output after 1 minute, so you need to get the glowplug and start cycle within that time of setting it to "start", which isn't too hard. Might be hard turning over a cold diesel engine, but should work if the engine is warm or a hot day.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans