How do I add space between items in an ASP.NET RadioButtonList

I've got an ASP.NET RadioButtonList that displays four items using RepeatDirection="Horizontal" to display them on a single line. I'm using RepeatLayout="Flow" to avoid the markup for a table. However, this causes the items in the list to be placed right next to each other, which does not look good.

So, I tried the table layout to take advantage of the CellSpacing and/or CellPadding properties. Unfortunately, these properties affect both the vertical and horizontal spacing/padding within the table, so while I get the horizontal spacing, I also get undesired vertical spacing.

At this point, I'm down to this:

<asp:RadioButtonList ID="rblMyRadioButtonList" runat="server" 
    RepeatDirection="Horizontal"
    RepeatLayout="Flow" >
    <asp:ListItem Selected="false" Text="Item One&nbsp;&nbsp;&nbsp;&nbsp;" Value="Item_1" />
    <asp:ListItem Selected="false" Text="Item Two&nbsp;&nbsp;&nbsp;&nbsp;" Value="Item_2" />
    <asp:ListItem Selected="false" Text="Item Three&nbsp;&nbsp;&nbsp;&nbsp;" Value="Item_3" />
    <asp:ListItem Selected="false" Text="Item Four&nbsp;&nbsp;&nbsp;&nbsp;" Value="Item_4" />
</asp:RadioButtonList>

...which screams at me "You're not doing it right!"

What is the right way to accomplish this?