[Edit - change of plan; the Dunlop seats are gone, it's now La Sarthe stand that we have]
OK, the Grandstand seats are for La Sarthe (aka Maison Blanche) - Esc 5. Rang E Place 121-122
Camping pass is Rang C 24 Place 76 on Bleu Nord.
Cost to me was:
* 1x Camping - £65
* GA - 2x Group rate @€57 - £111
* Stand - 2x face value €96 - £186
Total - £362 + P&P (or collection)
Roll up, roll up

Ewan