Looking for help for next drawing

[^02RAF_Puff]

Hi Folks.
First off let me introduce myself, My name is Kevin Moffat and my other part time job is Aviation Artist. My next drawing is a commission for a chap who wishes to have a drawing of Fl/Lt RF Boyd of 602 Sqn during the BofB. The main problem I have now is finding the correct markings of the two 109E4's that he had combat with on the 11th of Sept 1940. So far the information I have managed to get is that the engagement took place at 22000 and came down to 500ft above the channel. The 109's were of I/Jg3 and Boyd claimed one destroyed and one damaged...but Battle of Britain :Then and Now states that the aircraft collided while in combat...all pilots survived the dogfight. The book again shows the serial numbers of 5276 being lost in comabt while the damaged 109 was serial number 5341.
I was directed to this site from Sim Hq as a good reliable source for the information I need...mainly code letters for the two 109's involved, the gruppe target/mission on the 11th Sep 1940 { allowing me to pinpoint the area the fight took place } and any particular markings on the 109's.
I have the info I need for Boyd's aircraft , access to the logbook through his son John, awaiting combat reports from the Archives at Kew..along with the Sqn ORB etc...but to make this as hisorically accurate as I can I really need help with the Luftwaffe side of things.
Hope someone can help and many thanks...
Best wishes
Kevin Moffat

PS I'll post the drawing when completed to let you guys see it.

Here is the composition I have for the drawing...showing the likely positions of the aircraft involved..