Check your local foodbank web page. Things are changing on a daily basis and some smaller foodbanks have closed to centralise to ones nearby and others have changed their opening hours, but something should still be available in your area.
To minimise contact some foodbank partners can issue a virtual voucher and send this to the foodbank by computer. Some foodbanks are making up parcels ready to collect to minimise contact time.
If you’re self-isolating you could arrange with the foodbank for someone else to collect the parcel for you or explain your situation and see if they are able to offer delivery.