http://imslp.info/files/imglnks/usimg/a/a4/IMSLP19086-PMLP24130-HG_Band_92.pdf
You don't need an arrangement because Handel wrote this for string orchestra (2 violins, viola and cello doubled with winds). One assumes there were several strings on a part originally but it will work just fine with one on a part.
Find the main site and bookmark it as it will come in handy. Not everything is here but a lot of things are.
Houndentenor
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