I have googled tarmac photos, copied them and printed them out. I glue them to the base and put a few light coats of Future to seal it and follow up with a flat finish. Don't see any reason why you couldn't do the same with googling the carrier deck of your choice, copying a photo of the deck and doing the same as I did to finish it. Costs a lot less to.
If you're up to it, you could also scratch build it from wood. I'm a cheap old guy so I take the easy way out. Hope this helps a little.
Jim
Stay Safe.