you dont need the tran so just get the light and maybe 1 or 2 leads to reach the top of the cupboard, which is about £8
You may need to ensure the wire will go up behind the cuboard, as if the plug is diferent you may need to rejoin on to the old plug/lead using a small junction box on the top of the cupboard,
unless you have the tools you may not be able to crimp join the cable by the fitting.
I have not seen that light ,but as said most of the actual light housings are similar although the units differ
some only come with a short lead from the light to the first plug about 800 mm before joining to a lead , this first plug/ socket is usually pulled up unseen behind the cupboard