I contracted with Excel/XL for a year as an FO and was in a similar position. Over 4500 hours but all right seat. They were prepared to upgrade suitable FOs, even on contracts. In the event I left before I could test this promise, but it certainly seemed that they were serious.
I would definitely make sure you ask the question at interview though as you could waste a lot of time gathering yet more hours that you don't need.
KT.