As to the original question..."Any Gay Male pro's in the RLD Windows"....well the answer is kinda or sorta . This is most likely not what you were thinking of but there are in fact several TS's in the RLD windows. The person at the Pro. Info Center in the main RLD told my wife and I that these folks are wildly popular. On the "Channels Amsterdam Forum" where I visit these folks are quite in demand by several of the "straight" posters.
But if you want a more traditional experience then one of the brothels that cater to gay men would be the way to go.
Good Luck to your friend. Amsterdam will be like being in a candy store.
Doc