There is a big red binder that is called the Big Red Book with all the parts in it for them. Dealers had them. I have one of those. NOW, today I see a black binder and says Service Manual for all the PK's. Starts out with the Plastic kings from 85 and up, but also has sections for metal ones and the smaller 1200 series. IN back is also a section for the U620, one of the last nice bigger hydro's with foot control and many had loaders on them. Nice that is in there. This seems to be similar manual, but more on repairs than parts, although there are parts pages also. $25, couldn't let that get away!
Same guy had new hitches and attachments in the boxes for PK's, some older three points and other things. He also had a box with two tranny's in them, all apart, 2 brake drums like fella on here needs, two clutch pedal and covers, few trinkets for only $60! I was thinking on them, even tho I don't really need those now, have two parts tranny's already. Think I might go offer $50 tomorrow and see if it buys them. Gears looked pretty good from what I could see.