Help with Furuno Transducer

[Heath]

Hi Guys,
I'm wondering if anyone out there might be able to help me.

I have a Furuno 585 in my boat with an Airmar B117 transducer

It is a non tilted element 200/50khz bronze through hull transducer.
It does not have temperature function.

It goes by the part number 520-BLD (B117-DT-10F) which stands for
B117 ( Airmar ) DT ( Depth/Temp) 10F ( 10pin Furuno)
Airmar part# 31-653-3-01

All the specs I can find say that temp is optional, optional on what I don't know, as some manufacturers list this transducer ( the B117) as having temp and some such as Furuno do not.

Now, in Australia there is the exact same transducer but it has the part number 520T-BLD, with the "T" standing for temperature. It is the exact same transducer except it has temperature.

Furuno have said that this 520T-BLD is not available in the USA!!!!

Just wondering if anyone has come across this issue before with Airmar transducers???

Many thanks
Heath