Ok, time to suggest this again, there are quite a few 3.66 sellers on the Classifieds as of 05:06 26/07/13

http://backpack.tf/classifieds/search/founding%20father

TF2Outpost -

http://www.tf2outpost.com/trade/13008927 - 4 Ref, Added.

http://www.tf2outpost.com/trade/13050060 - 3.66

http://www.tf2outpost.com/trade/12987877 - 3.77

http://www.tf2outpost.com/trade/13064965 - 3.33

http://www.tf2outpost.com/trade/13067798 - 4 Ref

http://www.tf2outpost.com/trade/12840596 - 4 Ref

http://www.tf2outpost.com/trade/13067415 - 3.66

http://www.tf2outpost.com/trade/13067403 - 4 Ref

http://www.tf2outpost.com/trade/13033026 - Rejected 2.77 would like 3,66

http://www.tf2outpost.com/trade/13006890 - 4 Ref

http://www.tf2outpost.com/trade/13026746 - 4 Ref

http://www.tf2outpost.com/trade/12973221 - 4 Ref

http://www.tf2outpost.com/trade/13020508 - 4 Ref

http://www.tf2outpost.com/trade/13012540 - Says 1:1 needs to fix that xD 4 Ref

http://www.tf2outpost.com/trade/13014203 - 3.66

http://www.tf2outpost.com/trade/13039930 - 4 Ref

http://www.tf2outpost.com/trade/13035034 - 4 Ref, added.

http://www.tf2outpost.com/trade/12983851 - 3.66

http://www.tf2outpost.com/trade/12711887 3 Ref, added

http://www.tf2outpost.com/trade/12981006 - 4 Ref, he was added then the guy retracted.

http://www.tf2outpost.com/trade/12890859 - 3.66

http://www.tf2outpost.com/trade/12858174 - 4 Ref

All the evidence I could find! Hope it gets accepted, not too high in demand, Brawling Bucaneer and Hornblower in definite higher demand, if you have anymore proof, please do post it in the comments!