Apple LaserWriter paper trays

With VCF: PNW six months away I want to try and get something together to make a presence. I am not aware of anyone demonstrating an entire fleet of Apple machines in a configuration as advertised as "The Macintosh Office" at any recent point in history so I thought I should dedicate a table or two to that. A quick inventory tells me I can totally get multiple compact macs, a Macintosh XL, an IBM XT and a netbooting Apple IIe going with a set of common office programs and networked together with a server running Appleshare so that people can play with the software and try a few games over the network. The key component however is I need to get a LaserWriter working and networked as well so people who play with MacPaint for example can print their art out. I have access to four or five printers, of which one will come up reliably and make a presentable attempt of dispensing toner and not leafing roller sludge everywhere however while I can find cassette trays for holding paper I cannot find the two brown paper trays that attached to either side of the printer. I see quite a few on google that are also missing the trays. Would calling them uncommon be correct or might someone have a set they would be willing to part with?