site. Has always worked great for me. Though as most know by now, Epson print heads being the pesky integrated things they are, do go bad, and then is the choice to replace or to just spring for a new printer. Also, there is designed in obsolescence, so, after a fair number of years.... Earlier this year, I replaced the print head on my 7900 (at about 2/3 cost of a brand new one).
Epson should, really, offer, instead of a warranty (or in addition) an annual maintenance fee. Exp. shows that having the machine gone over by a tech somewhere in that 13th to 24 month period, and then annually thereafter, increases longevity. Still there comes a time to let go the past and embrace the now to the next 5 years or so. The SureColor (esp. commercial) wave seems poised to replace the StylusPro.
Anyway, the Piezo cleaner/flush should work for you with the earlier Epson models you mentioned, though, you will need to be patient for the cleaner to wipe out your ink clogs. To this extent, I would advise to order two or three bottles of the cleaner. With serious clogs you will certainly go through more than one bottle; that's just the nature of the epson print heads with their tiny, tiny nozzles.
Anyway, hope this helps in your restoration project.........