Hello, I bought mine from "Classic Parts of America." I had no trouble with it. The only thing I had to modify was the battery hold down bracket. The angle strips on the corner were really close to the battery post. Wasn't a problen to modify. If you are using a 6-volt battery I bet you would have no trouble. Just my thoughts. My last catalog list the price as $44.95 for the box,$11.95 for the battery top retainer. May be more by now but as I said it bolted right in. Good luck.
PS: You could make a simple bracket to hold the battery down. Probably you may have a piece of scrap around the shop.