I found a source for NOS oil filter foe the 1930-31 @@A engines. This may work for DeVaux,.
Every time I looked for these oil filters on eBay if I could find one they ran for $70 and up, even the defectives repro filter are priced at $70 plus shipping.
Well I found treasure of these NOS filters at an unlikely source, go to egge.com link is below.
They are on sale for $10 each, no typo $10 each. These are the Standard brand and made between August 1968 to November 1969, date on box.