That's an interesting hiring process.
Sorry, I can't help you with a holster. When I started I was issued a S&W 6906 then a S&W 4053TSW then a S&W4056TSW and finally my M&P with a Gould & Goodrich K-Force holster. I think you should be able to use a Glock 22 or an XD40 holster also.