Bit of an odd question ... approximating "maltwine"?

Long story short, I am interested in experimenting with some historic cocktails that feature the use of oude genever. Unfortunately, it's nigh on impossible to get oude genever where I live, but I always hear that the base flavor is more similar to a very malty, sweet whiskey than anything. I figure that maybe approximating using a whiskey will at least give me a chance to try these things, but I need to select the right whiskey for the job.

What whiskeys would you recommend that might fit the flavor profile? If you've tried genever, then fantastic! But if not, I think I'm looking for something very malty and rich and on the sweeter side (and preferably an inexpensive price point as this is experimental).