Console Solution
There are consoles that you can buy that are aftermarket consoles. These are not "reproductions" but they are nice consoles that match the interior vinyl so there is a smooth transition in the original color scheme.
Try
www.bthunder.com and click on "Mustang" to see all consoles available. There are variations that you need to consider depending on your particular classic mustang.
You can also "two-tone" the vinyl for Pony deluxe interiors. They are completely upholstered which is pretty cool too and the stitch work from what I have seen is really nice.
Classic Consoles makes these and they make some drink holders as well for cheaper that slide into the ashtrays. Cool idea and very popular. I have seen several of these around and they look really good.
Although these are not "original reproductions" they are removable and extremely simple to install. The manufacturer's website is
www.classicconsoles.com which also has several Mustang supply companies that you find parts from, too, that advertise on their site.