Go to www.homebs.com/flsdk and find the downloads section and you can download a FLMM version of the Ubershield. Here's the XML code for the shield:
<script>
<header name="Nearly Invulnerable Shields Mod">
<scriptversion>
1.0
</scriptversion>
<author>
Daekar
</author>
<description>
Makes a shield with max capacity
1,000,000 and charge rate of
100,000 available at Mann.
All ship type/mount class compatible.
</description>
</header>
<data file="data\equipment\market_misc.ini" method="sectionappend">
<section>
[BaseGood
base = Li01_01_base
</section>
<source>
MarketGood = heavy_fighter_invulnerable_shield, 0, -1, 10, 10, 0, 1
</source>
</data>
<data file="data\equipment\st_good.ini" method="append">
<source>
[Good
nickname = heavy_fighter_invulnerable_shield
equipment = heavy_fighter_invulnerable_shield
category = equipment
price = 5
item_icon = equipment\models\commodities\nn_icons\EQUIPICON_shieldgen.3db
combinable = false
ids_name = 263758
ids_info = 264758
shop_archetype = equipment\models\st\li_refractor_shield.3db
material_library = equipment\models\li_equip.mat
</source>
</data>
</script>
<script>
<header name="Nearly Invulnerable Shields Mod">
<scriptversion>
1.0
</scriptversion>
<author>
Daekar
</author>
<description>
Makes a shield with max capacity
1,000,000 and charge rate of
100,000 available at Mann.
All ship type/mount class compatible.
</description>
</header>
<data file="data\equipment\market_misc.ini" method="sectionappend">
<section>
[BaseGood
base = Li01_01_base
</section>
<source>
MarketGood = heavy_fighter_invulnerable_shield, 0, -1, 10, 10, 0, 1
</source>
</data>
<data file="data\equipment\st_good.ini" method="append">
<source>
[Good
nickname = heavy_fighter_invulnerable_shield
equipment = heavy_fighter_invulnerable_shield
category = equipment
price = 5
item_icon = equipment\models\commodities\nn_icons\EQUIPICON_shieldgen.3db
combinable = false
ids_name = 263758
ids_info = 264758
shop_archetype = equipment\models\st\li_refractor_shield.3db
material_library = equipment\models\li_equip.mat
</source>
</data>
</script>