Front brake master cylinder 78 KZ650 D1

The master cylinder for the front brakes on my bike is trashed. I haven't had much luck finding an exact, rebuildable replacement at the local bike recycler or on ebay. Bike Bandit appears to have the entire assembly but it's close to $400(!) Z1enterprises has what looks like the older single-caliper style. I'm curious to know what others in this situation have done regarding front brakes.

Thanks!

May usually be restored unless the bore is too badly pitted.

Often the old pistons and cups remain serviceable after careful thorough cleaning.

Rebuild kits are available if needed.

Good Fortune!

Image from kawasaki.com shown for reference in following post.

[Click on image to enhance view.]

Looks like standard trapezoidal style (probably 5/8" bore) used on dual front disc models.

Per kawasaki.com, same master cylinder
part# 43015-1009 is used
on the following 17 models:

KZ1000-A3 (KZ1000) (1979)
KZ1000-A3A (KZ1000) (1979)
KZ1000-A4 (KZ1000) (1980)
KZ1000-B1 (KZ1000 LTD) (1977)
KZ1000-B2 (KZ1000 LTD) (1978)
KZ1000-B3 (KZ1000 LTD) (1979)
KZ1000-B4 (LTD) (1980)
KZ1000-C1 (Police 1000) (1978)
KZ1000-C1A (Police 1000) (1978)
KZ1000-C2 (Police 1000) (1979)
KZ1000-C3 (Police 1000) (1980)
KZ650-C1 (Custom) (1977)
KZ650-C2 (Custom) (1978)
KZ650-C3 (Custom) (1979)
KZ650-D1 (SR) (1978)
KZ650-D1A (SR) (1978)
KZ650-D2 (SR) (1979)

Good Fortune!