Backup to remote power switch?

Hi

I have a couple of remotely managed power switches at my colocated rack.
example:
http://www.kvms.com/Product/AP7931.aspx
I have one with 16 sockets, another with just 8.

I'm worried if they ever break I will have no redundency to them, and have to purchase a power supply late at night, head 2 hours to the data centre and replace them. As a result I'm looking for a standby hostspare. (not uninterruptable redundency, that level of uptime is not required). This would allow the on call engineer to swap out the power strip in the event of failure.

I don't need a whole 16 socket £600 remote managed PDU spare as that might be overkill, and 2x 8 sockets seem like too much redundent hardware. I'm wondering if it is acceptable to have a couple of cheap power strips, e.g.
http://www.overclock.co.uk/product/Belkin-F9M820UK2M-8-Socket-SurgeMaster-Maximum-Series-with-Telephone-Protection_8559.html

with some 16x kettle leads:
http://www.ebuyer.com/product/123986

So I have redundent power for £100 of cheap components?

If I had to swap them out, they would be in production for no more than 2 weeks which an appropriate all bells and whistles APC type remote controlled power switch was purchased.

Is this reasonable?