(not my first post here - just keep losing my access details as I move)
Is your aircraft definitely a microlight? The non-microlight versions have a more useful load and a much higher cruise speed. Tail or nose wheel?
My skins had been changed after about 10 years. It had done similar hours to yours and I assume it was kept indoors at the homebase. It is possible to spray them with a UV protector but there are downsides to that too.
The quote you have seems to include the fitting of the skins, and is a pretty involved job which I wouldn't attempt without the original build manual. It would also involve disconnection of controls and removal of flying surfaces, and therefore the inspections that that would necessitate. I would be surprised if a first timer could do it in less than a week.
You might find surplus skins available via Rans.com US website as long as you are not fussy about the colour, or whether the wings are the same colour as the fuselage etc. There may even be pattern skin makers around.