You asked about medals with Cave Painting art… How about these from the Medallic Arts, National Park Series?

There are also a couple of NCLT coins from Niue and Palau that come up when you search on eBay.

You ask about cave painting art medals. I know of one such coin, also a Finnish one. The image of the coin is attached, downloaded from the web site of the Bank of Finland. I described the coin as follows in my book Watercraft on World Coins, Vol. I: Europe, 1800-2005.

50th Anniversary of the End of World War II
KM-79 2000 markkaa 1995 .900 gold
The obverse features two elk boats. The somewhat mysterious comb-like motif is based on prehistoric Scandinavian and Karelian rock carvings dated to the later Stone Age. Some archaeologists believe that the carvings depict prehistoric boats with an elk head as a figurehead (probably made of wood); however, no remains of such boats have been found and the interpretation is conjectural. The reverse features a fishing net based on a prehistoric Finnish rock painting. The symbolism of the obverse and reverse designs is difficult to interpret and there is nothing on the coin to indicate that it was struck to mark the end of World War II. In Finland this war with Germany, the so-called Lapland War, ended on 25 April 1945.