If he has harley prices then just look and don't buy.  We'll help you find a good deal.  For the pod filter you want one with a opening that measures 57mm (2 1/4").  For exhaust- generally 1.75" to 2"easy can be adapted fairly easily to the LS650.  HD dyna and sportster mufflers are almost a direct bolt on.  There are some certain HD mufflers you want over other ones.  I don't remember which years to avoid due to the crossover pipe but I'm sure someone will be along shortly to fill in that info.

i would not buy anything from the harley guy .... coz he was an a$$whole, i am looking for some exhaust so i would not have to rejet the carb ... my knowlege is prety poor ...
i would like to put that cheap home made raask like exhaust .... but i am sure i will have to rejet.
i found some stuff on ebay but most of them are in US and i am in Cyprus, and it will add the posting, and some tax on top ...
i found some nice screaming eagle lookalike exhaust, don't know for sure but i think somebody here makes them, the price is ok ... first time i asked to a shop and the guy said 130 euro, mounting not included, he said it will be around 40 euro extra ... i said i will think about it and left ... i felt like the guy is ripping me off ....
so i went to a garage where they mount exhaust for the cars ... i was looking if the guy can make me a raask exhaust ... and i found the same exhaust i saw in the shop before ... at 70 euro with the mounting ...
so it is a 100 euro diference ...
this exhaust seems to be buffled, so maybe i will not need to rejet ...