A quick search on e-bay returns a few, if you'd rather avoid ebay try contacting some of the sites listed in our parts and suppliers section here.
In there you'll find the "Hi-Fi collective" along with "The Voice of Music turntable spares" mentioned. Also worth a look is "The stylus lady" who is found at https://www.thestyluslady.co.uk/
Actually a badged Lenco L75 . (Goldring Lenco GL75, as more commonly sold in the UK)
Check the arm bearings whilst you're in there. Most have gone soft, and allow play. Desmo make superb replacements.
A fabulous turntable once fettled.
If you want a cheap and cheerful cart, you won't be disappointed with an Audio Technica AT-91. Great value for money.
As mentioned, the Leak is a Goldring Lenco. An interesting site dedicated to such may be seen here.....
To understand the black art of electronics is to understand witchcraft.