Designing Kitchens and Bathrooms - Replacing old medicine cabinet light covers

I'm going to be selling my townhouse and would like to
replace the old light covers on the 3 bathroom medicine cabinets.

I can not figure out the manufacturer of the medicine cabinets,
and stores like Lowe's say they can not get them anymore.

I've posted a picture of the cabinet with one of the light
covers off. I just need new covers as these ones have
turned yellow and have been burned by using too high
a wattage bulb.

Pictures:
http://stuff.wso.net/medicine_cabinet.htm

The only identification on the unit is the UL codes, which
are: Issue #: D-26,167 and E-10414-L-C0. Underwrites
Labs says the info is too old and they can not look it up
for me, and their web site doesn't have any info either.

If anybody knows where I can get these, please reply
here.

Thank you very much!
Puddy

Chances of finding replacement light covers on discontinued medicine cabinets will be next to impossible. Letting the new homeowners replace the medicine cabinets when they update the bathroom or replacing them yourself to make the home sell quicker are options.