Thanks for the links and tips. Great tip about general internet searches to start the query with "peachparts.com". I've noticed, during the relatively short time I've been here, that "Diesel911" does have lots of great info. As you mentioned, one of MANY, to be sure.
I guess my hurtle now is to locate the washers and o-rings. Viton seems a little more elusive as most I've seen are the black nitrile. Not at all sure about the crush washers. Seems most of the "usual" sources have them for other IP's but not the E300's. Haven't looked too extensively, yet. I guess if one had the proper dimensions there would be many sources to choose from. I'm sure the info is here on Pelican, somewhere, and I know I've seen threads discussing how and where to find the parts. Just gotta do more digging....