Below is a list of links to websites that we have been using for the past two decades.
http://www.woodsport.org/ MK1 MR2 v6 and v8 parts supplier. UK based.
http://twosrus.com/ The premier Toyota MR2 parts supplier. Even Toyota dealers purchase parts from them. Fast shipping.
https://www.rockauto.com/en/catalog/toyota RockAuto has been supplying Toyota MR2 parts since the early 2000s. Be careful of buying those super rare turbo or supercharged MR2 axles. Most likely they are the incorrect parts.