Early 351 Windsor Altrenator Brackets

I have a 1968 Mustang Coupe. It used to have a worn out 302. I am in the process of replacing it with an early model 351 Windsor. I am having trouble finding alternator brackets. I thought I could reuse the 302 brackets, but due to the increase in deck height of the 351 Windsor they don't fit. It seems that 289-302 brackets are available everywhere. Early 351 Windsor brackets are another story. I have searched high and low at numerous junkyards for only to come up empty.
Does anyone know who makes an aftermarket set, or anyplace that has used ones available? Any help would be appreciated.
Thanks
Robert Funk
San Marcos Ca.

I was all set to buy a set of March altranator brackets for around $100. Then I contacted JMC motorsports in San Diego Ca. They have a billet piece that allows you to use the original 289-302 brackets. The great thing about it is it's only $34. I got one and it works great! They also have one to allow you to use your original power steering brackets from your 289-302.
Robert