I just use a Fluke SV225 stray voltage adapter. It’s rated CAT III, 1000V and CAT IV, 600V, so is safe and will also fit many other brands of high impedance digital meters. From what I gather from the instructions, it is basically a 3000-ohm load in a convenient cube package.
I bought it to use with my 87 meter. It’s small enough to store in the zippered case along side of the meter.
