Might have a SCART input, but not 2. In any case, the existing SCART leads wouldn't reach it. Hence I will need 2 SCART-to-HDMI converters for the 2 HDMI inputs
Get a 2 (or 3) into 1 SCART box, then you only need one SCART-to-HDMI converter. Most come with a fly-lead for the output, which might give you the extra length needed. The basic ones use a switch to select the required input, but others auto-detect based on which input is "live".
On second thoughts, I may have got your problem the wrong way round - apologies, if that's the case...