Fx Rates Using DSS

Hi
I'm trying to get Fx rates for multiple currencies to Swiss Franc (CHF)
I'm using IntradayPricingExtractionRequest
I'm using RIC as an identifier

when I try
CHF=
I get the USD -> CHF rate
but when I try
USDCHF=
I get
"Error": "Not found"

I need the base currency to be always CHF
I need the RIC's to have the same format (I can't have CHF= and EURCHF=)

because I'm looping through multiple currencies
Is there a way to achieve this ?