Does it have the rail inlet into the forend? If so, Midway was carrying adapters for them when I bought my 64 a couple years ago. Be certain it will fit the Annie rail if you go that route.
No, unfortunately it does not have the rail. I have a 64R that does have the rail you mentioned.
Installing a rail is my other option but it would require inletting and I do not have the equipment or experience.