What Coolant Hose should I buy?

1999 Range Rover 4.6 HSE (P38):

I have a leak in a coolant hose from the reservoir to the throttle body heating plate. Can I use any heater hose with some hose clamps, or does it need to be the exact specific hose from the manufacturer? Also, any idea what size hose this might be?

Here’s a link to the heating plate it hooks up to:

https://www.amazon.com/MGM000010K-Throttle-Heater-Gasket-Discovery/dp/B0096W4VEY/ref=pd_sbs_263_1/140-5141091-4494659?_encoding=UTF8&pd_rd_i=B0096W4VEY&pd_rd_r=3d7971cb-7dfb-47a7-8a91-3e6ddf8912e6&pd_rd_w=3xzpm&pd_rd_wg=gICEM&pf_rd_p=d28ef93e-22cf-4527-b60a-90c984b5663d&pf_rd_r=Y09TVB2R5JTNX26V2SQJ&psc=1&refRID=Y09TVB2R5JTNX26V2SQJ