That motor series is very old, so you won't find a new one. A Mabuchi EG530AD-2B is a direct replacement, but recently has been discontinued by most vendors. I see one for sale on Ebay.
Another option is an EG530KD-2B. It a two speed motor. All you do is buy a small 5K trim pot and connect it to the two extra terminals and you are good. May stores have them in stock. Here in US it's Audio Lab of Georgia.
Once installed, you adjust the trimpot for correct speed using a speed tape and counter.