Add windows to a panel van

Just seen a panel van with low mileage and started to think about a conversion. Whats the thoughts on putting windows in the sliding doors? Body looks very good condition (its a 2002 with under 10k on clock) so seems silly to change doors to ones with windows in already then I would have to match paint. Anyone added windows and can advise on cost, difficulty etc. did a bit of googling and keep getting distracted looking at what can be done!

I bought some Hijet MPV doors, which have windows in them from ebay. You might find it's cheaper that way.

For example: http://www.ebay.co.uk/itm/DAIHATSU-HIJET-SLIDING-DOORS-WITH-WINDOWS-1996-7-ONWARDS-/161666097966

Yes maybe, will have to look at that option, although £100 for two doors...is fine...so long as they are right colour otherwise I am in to painting costs as well. Thanks for info.