Cheers dude, I was in the very same boat as yourself when I was a kid as it was MMPR that filled in the gap for me between G1 and Beast Wars; so these 2, Titanus and the 2nd series Zords had always remained on my list of childhood toys I never owned and I've since been lucky to acquire all bar 2 of these toys.
If your interested Rampagesss, checkout eBay UK; there is a number of these 2 Zords that are MIB that are available, bare in mind though that they're quite expensive after postage is factored in.