FP3000 isn't available at the local stores.
I would think that MMO, Lucas, any 2-stroke oil, and biodiesel would be good choices.
There are no biodegradability requirements to TCW3 that I can find. If you want to use that word, please quote the NMMA requirement. Lets not create more internet hearsay.
Also, most of the biodegradable lubes use better basestocks. So, maybe a requirement would be a good thing.
Since API SM dropped ZDDP for other chemicals/oils.... whose says that TCW3's requirment is bad? I see it as good when you can meet a spec without using old additive technology.
Also, I still will question JASO or ISO. There is no proof that those specs were better in performance. I'd also put more faith in a non-certified to anything $8/pint castor oil.
At a low dose of 1oz for 4-5 gallons of gas, I doubt it'll make a difference which brand you use. But, I have faith in the TCW3 requirement and would recommend it.
Since the dose is low, I wouldn't even worry about the catalytic. There are catalytics on some 2-stroke engines, there are many 4-stroke oil burners out there, and there are oil injected 4-stroke engines. I still haven't seen any massive run on replacement catalytic converters.