Where do I find a ECM for a 1998 Isuzu Rodeo or a place that'd fix the old one?

What is your question?

Can please someone see if they can send me information regarding the replacement of an ECM for a 1998 Isuzu Rodeo LS with a 3.2 liter engine. The issue seem to have gone like this: I broke down with my car then I had to change the alternator I end up putting a higher amperage alternator from 60 to 70 amps then the rest is history. At the begining it responded well didn't notice anything unusual even after I tested for voltage and amperage; it was all within range then reality sunk in the next day the battery was dead and I bought another battery and to my dismay it was dead again. So I put in a kill switch in the meantime and I left it like that for a while since it's my spare car I was hoping that perhaps I'd make it thru the next winter. So I was kind of disapointed with this alternator and was ready to replace it with another more less amperage so that perhaps the computer would overreact since I was getting different scenarions like as soon as I'd put the main switch and some of the dash lights would go on but they would go off as soon as the car would start and so on. Another issue that perhaps made me realized that I needed to do something was that on ocassion some of the other lights like ABS and Battery lights or Engine would also go on and they soon would also go off but more whenever I would try to accelerate so finally on one of my very few rides around the block to get milk I finally broke down luckily almost infront of my house but not before it was acting like it was loosing power and at times it was kind of doing the same thing. So I guess that I responded a bit too late and today I need another ECM for my car or otherwise I won't be able to drive my car witch has cost me the cost of the car a couple of times over the real value of this car .. Please help with ECM I know I need one because the ECM fuse keeps blowing and I smell smoke from the inside of the car and when I checked the ECM surely enough there was a burned component to the electronic board So a couple of questions before I leave can the ECM electronic board be fix or is it better to just try to replace it with a used one or are there better solutions to this dilema. Txs for your kind response if you have an idea of what I meant but furthermore a solution to this problem would be appreciated. My name is Archie and you can E-mail me at Archdepot@hotmail.com looking forward for some meaningful answers to this pain in the potcket issue.