rbma.user.js

// ==UserScript==
// @id             www.rbmaradio.com-9a6f2253-11bd-4aa4-9f5c-cadfa1899da0@scriptish
// @name           RBMA Radio - Add Download Link
// @include        http://www.rbmaradio.com/shows/*
// @run-at         window-load
// ==/UserScript==

var url = unsafeWindow.gon.show.akamai_url;
var ul = document.querySelector('.l-more ul');

var li = document.createElement('li');
ul.insertBefore(li, ul.childNodes[0]);

var span = document.createElement('span');
span.textContent = 'Files';
li.appendChild(span);

var div = document.createElement('div');
div.className = 'links';
li.appendChild(div);

[96, 128, 256].forEach(function(rate){
	var link = document.createElement('a');
	link.href = url + '&cbr=' + rate;
	link.textContent = rate;
	link.setAttribute('data-bypass', 'true');
	div.appendChild(link);
});