I hope someone can help find another straight arm with a 225mm mounting distance (like the Lustre GST-801. The only ones I know of are the Audio Technica AT-1100 and AT-1120, and possibly the Sonus, but they are all for lightweight carts.
The Hadcock GH242 is 1mm too long (226mm mounting distance according to my data) and the Dynavector arms (not straight, but weird enough to be included) are also 1mm too long, and the Magnepan Unitrac is 1mm too short.
Disclosure #1: I actually put an 1100 up for sale as part of a turntable set around the time of this thread without knowing this thread was there. Disclosure #2: I'd probably rather have the GST-801.