Need Message When No Products are Avaialble

Thnaks for the suggestion .
As quick fix you can add this to template:
{if !count($products_to_renew)}No New Products Are Currently Available{/if}

Yes in member.html after this block:

Code:

{if $config.member_select_multiple_products}
    {foreach from=$products_to_renew item=p}
    <input type="checkbox" id="product{$p.product_id}" name="product_id[]" value="{$p.product_id|escape}"
        {if in_array($p.product_id, (array)$smarty.request.product_id)}checked="checked"{/if}
        />
        <label for="product{$p.product_id}"><b>{$p.title} ({$p.terms})</b><br />
        <span class="small">{$p.description}</span></label><br /><br />
    {if $p.price <= 0.0 }
    {assign var="paysys_id_not_required" value="1"}
    {/if}
    {/foreach}
{else}
<select name="product_id" size="1">
    <option value="">#_TPL_MEMBER_SELECT#</option>
{foreach from=$products_to_renew item=p}
    <option value="{$p.product_id}"
    {if $p.product_id == $smarty.request.product_id}selected="selected"{/if}>{$p.title} ({$p.terms})
    </option>
    {if $p.price <= 0.0 }
    {assign var="paysys_id_not_required" value="1"}
    {/if}
{/foreach}
</select>
{/if}

Yes in 3.1.9 you should modify member_add_renew.html