RCA 66bx globe trotter battery info wanted

[mr_fixer]

Hello All! i found this last weekend and got it working on AC but i've been itching to make a battery pack for it. what is the best recommended way to get 90 volts? 10 9 volt batteries or 60 aaa's or aa's? "Paging Dr. Batterymaker!"
Have you made one of these yet? Oh what would anyone recommend to use as a replacement plastic for the dial surround "glass" it originally was plastic but shrank and broke into several pieces. Thanks All!