Some ideas below

Morvelo cycling socks
Running top
Cycling summer skull cap (issues with sweat getting in eyes as less hair now)
Sweatproof Run cap (See above)
Summer fingerless bike gloves
New bike shoes
Flymo Ultraglide
Garmin 520 bike computer
Bluetooth noise cancelling headphones (over ear, big ones)
Valve Headphone Amp

Reference Headphones over ear (www.whathifi.com)

Favero Assioma Duo Power Pedals
Mason Resolution 105 Hydro
Zipp 404 firecrest wheelset
Specialized S Works Venge Vias Disc Di2 2018 Road Bike