Welcome to the forum, Aaron.
Yes, those sound like "lamp related" problems sure enough. Not so sure about the "artifacts" you mention, though ... could be a moth or some such critter on a suicide mission!
I have seen 300W Cermax Excelitas Xenon Lamps (PE300BF) for the Stryker X-6000 available on various websites for around £ 180. Similarly the PE300C-10F for the X-7000 seem to go for around £ 380. They should be good for at least 500 hours.
Hopefully someone else on here will be able to recommend a particular supplier in the UK.
Here is the manual
for the X-7000. There is some information about the WARM message in there. It reads as though the unit is trying to talk to the Ethernet connection - maybe that needs to be disabled ... but how?
Some other Stryker manuals can be found here
That's a nice site
(and blog), by the way. Good people.
Keep up the good work.