Ahhh... Hang on. Just looked at an A7 now (not worked on the engine of mine yet so a bit embarrassingly light on knowledge

)
Rear camshaft has distributor assembly and front camshaft has a separate sensor assembly... Looks like you have taken apart the front one?
These are the innards;

So I would concur that you are looking in the right area (can't see any actual sensor located around the crank of the engine, only these at the top)
Part numbers are (I haven't bothered spacing out the price etc. too much hassle! but part number/description should be near enough in columns

) ;
Ref Part No Description Price (Each)Req QtyQty / Add to Cart
1 30100PK2036 DISTRIBUTOR ASSY. (TD-02P) (TEC)£302.19(€353.56)($389.83)1 - unavailable -
2 30102PK2006 CAP ASSY.£39.24(€45.91)($50.62)1 - unavailable -
3 30103PK2006 HEAD, ROTOR£13.37(€15.64)($17.25)1 - unavailable -
4 30110PA1732 O-RING, 26.4X3.1 (TEC)£5.96(€6.97)($7.69)2 2 Add
5 30110PH3006 O-RING, CAP£4.97(€5.81)($6.41)1 - unavailable -
6 30113PR3006 COUPLING SET (TEC)£27.46(€32.13)($35.42)2 - unavailable -
7 30135PL2006 SCREW-WASHER, 5X10£3.92(€4.59)($5.06)1 - unavailable -
8 30168PK2006 CORD ASSY., EARTH£0.00(€0.00)($0.00)1 - unavailable -
9 37841PK2026 SENSOR ASSY., CYLINDER (TS-03C) (TEC)£218.50(€255.65)($281.87)1 - unavailable -
10 37842PK2006 CAP£12.51(€14.64)($16.14)1 - unavailable -
11 37843PK2026 GENERATOR ASSY., PULSE£76.71(€89.75)($98.96)1 - unavailable -
12 37847PH3006 ROTOR, TDC (4)£50.88(€59.53)($65.64)1 - unavailable -
13 37848PG7006 ROTOR, CYLINDER£52.62(€61.57)($67.88)1 - unavailable -
14 37849PH3006 ROTOR, CRANK (24)£50.88(€59.53)($65.64)1 - unavailable -
Looks like item 14 is meant to match with the crank TDC position and one of the sensors on the short loom near item 12, is the pickup for it? However item 12 is not available separately? (only as part of a whole new distributor?)
For new bits, you could have a look on
http://www.ignitioncarparts.co.uk