L-Pad attenuator question

[Tremster]

I want to build a simple L-Pad attenuator for my 5 Watt Blackheart Little Giant Head.
More Info here: http://www.madbeanpedals.com/forum/index.php?topic=7777.0
The amp has 5 watts and a 16 ohm speaker. So I guess I'll need a 15 Watt 16 Ohm L-Pad. Right?
But where to find such a thing? Especially in Europe? Musikding has the 8 Ohm version:
http://www.musikding.de/Attenuator-15W-8-Ohm

Parts Express has the 50 and 100 Watt versions.
http://www.parts-express.com/speaker-l-pad-attenuator-50w-mono-3-8-shaft-16-ohm--260-254
http://www.parts-express.com/parts-express-speaker-l-pad-attenuator-100w-mono-3-8-shaft-16-ohm--260-261
50 Watt is out of stock, and I don't necessarily want to ship one little part around the globe?

Can I not just use the 8 ohm version? I think that's what the expensive Bitmo kit uses, but do I need some resistors to compensate?
http://www.ebay.com/itm/BITMO-10-UATOR-KIT-10W-ATTENUATOR-PLATE-4-GUITAR-AMP-/140480002003
http://www.xtremewebshop.com/prodotto-145518/-BITMO-10-UATOR-KIT---15W-ATTENUATOR-BOX-FOR-GUITAR-AMP.aspx

Thank you!

[Jebus]

I don't have any answers to your questions, but I remember seeing stereo L-Pad (2 x 8 ohm). You could get that and wire it in series to get 16 ohm "version".