I did think the correspondence was more direct than that when I posted the link, but all the indications I can find point to that being an equivalent - assuming your part number is 669265-001 as per HP:
If this is the part number of your PSU, scroll further down past where your 520-1030uk is shown, and towards the bottom of the list you'll find HP's device category 180W 19V/9.5A 3 Pin Right Angle EPS 2 QS962AV. Click on the QS962AV link then "List all parts for this product", and you'll find HP's equivalent supply is 681059-001. (I can't show a link to this screen as it's generated dynamically.)
Both this 681059-001 and the 463952-001 are offered as replacements for the same products, e.g. HDX9000:
I suppose it's fair that the sales staff can't offer you a guarantee, and true, neither can I, but it certainly looks to me like the equivalent that came up on my search should be suitable.
Edited by Platypus, 22 April 2013 - 08:00 PM.