A3OD

Tried refreshing the driver's side headlight again recently on my HS after a few years since it was looking dull again, passenger side is still good.
I've sanded it down and re-clear coat it and now it looks like there's some spider crack lines built in and doesn't look as good as I wanted it.

Are these headlight lenses for the HS replaceable? or would I need to just swap them out for new / good used ones?

Clutchless

You will need a replacement headlight assembly if you replace it. Look on eBay for used ones.
However, I would first get one of those headlight restoration kits (if you did not use one initially and just sanded it) Get one like the 3M headlight restoration kit that has buffing/sanding pads that fit on a cordless drill and special compounds. You work through the lens 3 times getting it smoother and smoother (it looks pretty bad until the final treatment). It is not much money on Amazon. I have used it a couple times on old cars. https://www.3m.com/3M/en_US/company-...3240875&rt=rud


Then get the Mequiars UV protection headlight clear coating which will keep your lens from yellowing for a year as refinishing removes the factory UV protection.

https://www.meguiars.com/automotive/...dlight-coating