The Traynor silver grille cloth can be purchased through a number of 
Canadian music stores. I'm talking to Murch Music in Cambridge, Ontario
and 12th Fret, In Toronto Ontario.
As for the knobs, check out Songbird Music in Toronto. They provided me
with a some Traynor knows a couple of years ago.  All three of the 
stores that I have mentioned have web sites and their real nice people 
to deal with.
Rick

Some other simple mods you can try are to;

- increase the value of the plate resistor on V2A to 220K (more 
distortion)
- add a .68uF cap to the cathode of V2A (higher gain in midrange)

The ground polarity switch is irrelevant with a three prong plug.

The green wire of the new cord must be attached to chassis ground. If 
you have a high wattage soldering gun, just solder it to one of the 
existing ground points around the filter caps. Make sure this 
connection is good.

You can then just snip off the ground lead from the cap attached to 
the ground switch and remove the switch. If you decide to mount 
another control (master volume?) this will give you a free control 
position.

The new config looks like this;

- one black lead of PT primary attached to fuse holder. White lead of 
power cord attached to other terminal of fuse holder.
- second black lead of PT primary attached to on/off switch. Black 
lead of cord attached to other terminal of on/off switch. Make sure 
switch is mounted so that up = on.

It is up to you as to whether you decide to keep the accessory plug.
I usually remove it and install an octal socket there (the mounting 
holes are the same placement) to use as a bias test point. If you
want to do this, email me and I will give you the details.

The cord replacement is very easy and the life you save could be your 
own.

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another way to wire the 3 prong cord is:
-green wire with a lug to one of the power transformer bolts. add an 
 extra nut to hold it in place.
-black wire to the fuse holder, wire from other lug of fuse holder to 
 power switch, other side of power switch to 1 black lead of the power 
 transformer. 
-white wire wire straight to other black lead of power transformer. 

some electrical engineers i work with felt it was safer to fuse the 
hot wire, not the neutral. i don't know which is right, this is just 
another way to wire it........