Adding ABS to my 96 Maxima GXE

Okay okay okay, i know this sounds unreal, but the last few cars i had were equipped with abs, although i just absolutely love my maxima, i simply wish it had abs, i have noticed a significant difference in the wet weather with abs and no abs. I know that the maxima in 95-96 offered abs as an optional extra cost item. Question is, how can i add abs to my maxima? anybody have any ideas? would a custom shop be able to do this? thanks