If you want the now hard to find "period correct" looking brake cables, the clear plastic covered one with the visible silver flat wound spring and black plastic liner in it, A BMX seller at Ebay had them for sale since last year. I got myself a set and they exactly match the original ones on my 84 PSV. You can always upgrade the cables in them to something more modern if you want to.
I forgot the name of the seller, but it still might come up if you do a search for "BMX clear brake cables"...maybe. I had the business card that came with the cables, I'll see if I can still find it and get back with you...It was cheap too, something like 15 bucks a set, IIRC.....or you can also get the much more expensive CLB aluminum casing cable set presently on sale at eBay.....
For tubular tires, I find Vittoria Rallys are good enough for everyday use as long as you don't get one with a crokked tread strip or a lumpy basetupe under the valve. They tend to vary greatly in quality from tire to tire, so go through a store's stock and a couple of good ones might come up. For a nicer lighter/plusher ride I also like the lower mid priced Schwalbe Milanos. Much lighter and better quality than the Vittoria Rallies, but less puncture resistant as it does not have a Kevlar reinforcing strip. Skinwalls preferrably, of course!
BTW, fine Peugeot you got there
. I'd be more envious though if it was my size. Fortunately it looks too big.
You did very well on the price too, I suspect it could have easily cost more than double what you paid for at $250, in that condition. That price usually only gets you a similar condition lower model PGN with 501 tubing.
Chombi