Option 1: Arda's Dude lacefront wig, which comes in Silver 063. However, it's $65.
Option 2: Arda's Glinda wig, which also comes in Silver. That one is $35. You would have to straighten it then add waves, or relax the curls down to a nice wave. If you buy some short wefts, you can make a faux hairline; follow Malindachan's tutorial on her deviantArt page. The wefts might also work to make the beard.
If either option scares you, try commissioning the wig. Good luck and hope this helps!