You haven't said what format Phillips you have, but it sounds like the 11x14 Explorer.

If so, you might check with Michael Ward Jones (APUG subscriber). If I remember correctly, he had S.K. Grimes make an extension lensboard for his Phillips Explorer that would allow him to use a 30 inch Artar. I think he later sold it on a prominent internet auction site....

I had Grimes make an extension lensboard so I could use a 1000mm Docter Optic Apo-Germinar on my Phillips 12x20 (~36 inch bellows draw). It works like a charm; the camera is very stable, and the front standard is more than strong enough to hold up that very substantial hunk of glass.

Don't give up on the Phillips just yet; they're pretty remarkable field cameras.