Buy accessories aftermarket or dealer install on leased RDX?

I am looking to lease an RDX AWD w/Tech this weekend and have received some reasonable quotes ($36.5K) for the vehicle, but the accessories I would like seem crazy expensive with installation.

Quote from one dealer w/installation
Body side moldings- $339 (MSRP: $259)
Trailer hitch w/inst. - $759 (MSRP: $519 hitch+attachment)
All season protection package II- $496 (MSRP: $353)

2nd quote
Trailer hitch w/inst. - $834 (MSRP: $370 hitch + $149 attachment)
Cargo tray - $135 (MSRP: $135)
Rear seat cover - $336.50 (MSRP: $249)
Floor mats - $160
Cargo cover - $152

I have seen people buying Weathertec or OEM mats online and self installing but if I am going to lease car for 3 years, isn't it better to roll in accessory cost into lease, perhaps get a discount and only pay for depreciation?

I can live without body side moldings but definitely would like back seat cover, mats, tray and hitch. Can I negotiate all four within say, $700-800?

Thanks!