Thats a cool idea! Shame its 10 years too late to be of much use, cant imagine theres many of that style vax tub still in daily use.
True, even 6131's are becoming rareish now because I remember when I was a kid, there were bright orange 6131's everywhere, now most of my neighbourhood owns Dysons
I remember there was a H20 vacuum in blue & white sold on Thane Direct, I thought it was very cool and always wanted one. Was the first water vacuum I seen before I learned there was Rainbows etc