Wanted info/data set for selectric terminal

[nige the hippy]

Just picked up an ebay 99p bargain (well I think so!) an IBM 2741 communications terminal, late '60s early '70s, based on the Selectric Golfball typewrtiter. I have some documentation, and an engineers pocket book listing all 243 critical adjustments (aarrgghh) What it hasn't got is the box that fits on the end of the ribbon cables, that turns it into a proper terminal (the Data Set ????).
Anyone know of any documentation on that bit (or have a spare one (and/or a main spring!))
I've looked at all the bitsavers stuff, but that only seems to cover the "selectric" bit.

[Ksarul]

I haven't seen one of those since around 1986 or so. They were uncommon then and I suspect even harder to find now, as most people wouldn't have realized they belonged to the Selectric when packing them up. . .

[nige the hippy]

It'd be nice to even see a picture of the missing bit, just so I know what I'm looking for.
Actually (Doh!) I must email the seller just in case.....