How to display a filetype as an icon?

JohnGWMS
Tourist
7 0 0

I have created a number of repeatable metafields to contain data for product page downloads - data sheets etc.

I can display each item in the following format:

    pdf 136KB Proximity Click 14 Schematic


However, I want to replace the filetype (pdf in this example) with an icon.

Can anyone suggest a function for converting a three-character filetype into an icon URL?

 Many thanks.

 

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