Barratt Tanks - 2 custom made water tanks
https://www.tank.me/
Shaun at Barratt Tanks is a specialist joiner and custom makes each tank to your specs.

Leisure Shop Direct- For all things relating to motorhome conversion
https://www.leisureshopdirect.com/ 
They are a great company with excellent customer service and sell many many parts for conversions.

Autogas 2000 - 30lt Underfloor LPG tank
https://www.autogasshop.co.uk/
This is an amazing piece of kit at a great price too. They fit a range of vehicles.

Simarine Smart Battery Monitor - Pico
www.simarine.net/product/pico-battery-monitor/
Approx £250 but excellent value packages available from £265

Silent Coat 2mm Damping Mat & Dodo Thermo Van Liner
www.deadening.co.uk/
Prices vary dependant on you vehicle - I choose the bundle deal which is excellent value!

Truma Combi Boiler 6E - Water heater and air heater
www.truma.com/truma-combi-6e
Approx £1700

Crafter Side Window x 2
www.vandemon.co.uk
Approx £100 each