Thanks everyone.
The inner shaft has worn out quite significantly causing the wobbliness .. almost no wheel return on slow speeds. This started happening years ago, maybe 7 or 8, during which I've eliminated all possible causes besides the steering gear, checked suspension, links etc. one shock absorber was bad so got it replaced, replaced tie ends and then found out the wearing in the inner rod and casing, a mechanic said he can fix it but made it worse.. instead of proper refurbishing, he placed a plastic casing inside the shaft..this worked fine for about a week then the casing broke inside making the steering very heavy. I'm not really into mechanics more into the electrics but my father who is a mechanical engineer said this was a fruit and banana up solution and he was right. It seems that an entire replacement is in due because I don't trust my rack could actually be refurbished after the mess it's been through.
The Delco part will fit, it's not easily available.. manual is quite rare but couple sites said they will specially order it.
But I understand why it wasn't available for Mitsus and just the Dodges.
The OEM manual rack for the Mitsubishis requires just one bracket and rubber cushion at the end because the central mount is built in the gear's body- as in the diagram above. The Dodge one needs an additional mounting bracket although mounting points are identical- which is the same for the power-assisted for both Mitsubishis and Dodges is they need 2 brackets.. the regular one at the end and another one -seems to be slightly bigger- at the centre. So whether I go for the power-assisted rack or the manual I'll still need the central bracket and cushion, I prefer the manual rack but so far I couldn't find the bracket and cushion which my car lacks and until I can locate this bracket I will not be buying the rack.. my father sez to go ahead and get the rack, that the bracket won't be a problem and worse case he can manufacture it but I don't know if I should trust him.
for reference: mine is similar to this but it's manual..you see the central mount is part of the shaft and requires no bracket:
The dodge manual rack looks like this, requires an extra bracket and cushion, parts 21 and 22