Vlookup then return a different row in Google Sheets

I'm struggling to figure out how to get sheets to first look up the location of a key value and then look up which of the sub values it should take. Best would be to include an example, which:

https://docs.google.com/spreadsheets/d/1pL62W7pSImMlTdnU3RMV4VDK3KIuNBT8l3VxClLGTd4/edit?usp=sharing

What I'm hoping to achieve is that the values for item 1, when selected, auto fill in the correct gear builder fields.

Any advice on this is hugely appreciated.