Updating OSC Message With a Ramp

Hi, I am trying to send the following OSC message:

@rect {5,5,x,5}

Those are the x,y and width, height numbers of an object. I am trying to update the "x" number, with a ramp object.
The issue is that the message has to be sent in exactly that form (no spaces). If I use a message box and $1 for the x, Max puts spaces where each comma is.

If I use a prepend object or something, I can't change the x number (i.e. the x number doesn't update). Any ideas on how I could use a ramp to change that x and send the message as it is with no spaces? Thanks