I have this one, and it is messy, but it does work if you prime it properly.  https://www.amazon.com/Shoreline-Marine-Oil-Changer-Volts/dp/B004UOU6L0/ref=sr_1_2?s=sporting-goods&ie=UTF8&qid=1477260707&sr=1-2&keywords=oil+change+pump 

The hand pump types with a bottle would be less messy, but you need a 1/4" tube to fit into the crankcase with the dipstick tube removed. I was not able to get a bigger nylon tube down the fill pipe, and it enters the side of the crankcase anyway, which would make it difficult to get the tube on the bottom.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of John Lauterbach
Sent: Sunday, October 23, 2016 2:11 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: '84 1.9L -- cannot remove crankcase drain screw -- what to do next?

I would appreciate a recommendation on an extractor pump.

John

On Sun, Oct 23, 2016 at 4:10 PM, Dan N wrote:

> you're right Stuart... the reason I use the extractor pump is to
> eliminate
> damage of the thread on the engine, over torqued and so on....
>
> :-)