Help locating a rectangular waste trap for kitchen sink?

[Draeger]

Bought a 1.5 bowl sink a while ago from B&Q but never got around to fitting it.

Now decided to fit it in my utility room but upon having a look at it the smaller of the two bowls appears to have a rectangular slotted waste exit in the bottom as in the photo below. I've scoured the web for a suitable fitting but can't locate anything at all. I don't even know if I'm searching using the correct keywords! (rectangular sink bowl waste trap etc).

Any suggestions on where to find something that will fit? Image below:-

 

[bremen1874]

It looks like it's intended to be used with standard rectangular overflow pipework.

KITCHEN SINK UNIVERSAL OVERFLOW KIT - ROUND - RECTANGLE | eBay

 

[Draeger]

Thanks, had a nose for something suitable and decided to just buy a new sink and use this one as a flowerpot in the garden!!!