I believe ergoclears benefit from lubing the most out of all the switches, due to its tendency to get 'stuck' on the upstroke. Reds, browns, blacks all benefit too, but it's not as needed as compared to ergoclears.
The springs supply is a little iffy right now - but I think mistakemistake (mimic cables) mentioned he was going to get some stock in the future. Not sure how far off is that. Otherwise, you'd either need to try and find it in the classifieds, or take a chance with sherryton (originative), who has the springs, but seems to be under fire from multiple directions as of late w/ regards to delivery issues.
as of now, unless you have a contact in korea, there seems to be no guaranteed way of getting the springs.