"Seton is an "indult" course if I can use that analogy which tries to marry tradition to the post-VII Church. That means the curriculum must be interfaith-friendly and must emphasize the Novus Ordo - two items which are anathema to traditional Catholicism."
Oh, now I understand what you were saying. I do see the NO assumed to be the Mass attended, but I am not so sure about "interfaith-friendly", it simply does not come up in the early grades that I have seen. I'll look harder...
A thought, however, even with the problems you mentioned it seems to me that one can work around this with Seton, at least in the Grades K-7 (what I have experience with). I would be dismayed to see Seton written off as 'unfit for Catholics,' because they do teach so much about our Faith, our Saints and culture. That Traditional Catholic parents might wish for more emphasis on certain things perhaps would not be a surprise, but I am not so sure the stumbling blocks are insurmountable.
I will take your advice and look for used book dealers in my area; funny, I already love thrift stores, gardening and inexpensive (free!) fun, but I never thought about used-book dealers. Well! It's summer, and school won't start for us until September...
Aeroharp