Anyone know the part number for the plastic card guides in an E2900?

The plastic card guides in my E2900 have perished and shattered inside of the machine. This led to the Baseplane being damaged beyond repair while a Systemboard was being replaced. The device is currently running, all be it in a degraded state, from only 1 Systemboard.

I need a new Baseplane (pert number 501-6014) and a full set of plastic card guides to restore service but, I can't find the part number for them and can hardly find any mention of them anywhere in any parts catalogue.

I have thought about taking the device out of service, stripping it down and sending the good ones off to a 3D printing business to see if they can scan and print me some more but... there's no approved business process in my company that would allow for this and I doubt I'd get the downtime approved. Also, at this stage, it's a massive gamble if the device will actually turn back on afterword's.